Carbureter.



E. S. SMITH. G ARBURETER. APPLIOATION FILED MAY 27, 1911 Patented July 1, 1913.

2 SHEETS-SHEET 1.

Y WIN 1 E. s. SMITH.

CARBUBETER,

APPLICATION FILED MAY 27, 1911.

Patented July 1, 1913.

2 3 2 m WW .4 4 4 0 M E M 4 m J W 1 E i H wow a Z Z z 7 H? 3. W W 6 n 3 .J W a W m .U 2 a (M W 3 0 2 y W. ,i o 7w L 6 X E 53 mm Mom 3 31 km anemic wi/lmmeoz ELMER S. SMITH, OF BOUNDBROOK, NEW MENTS, TO INTERNATIONAL ACCESS WILMINGTON, DELAWARE, A CORPOR JERSEY, ASSIGNOR, BY MESNE ASSIGN- ORIES MANUFACTURING COMPANY, OF ATION OF DELAWARE.

CARBURETEB.

Specification of Letters Patent.

Application flied May 27, 1911.

Patented July 1 1913. SerialNo. 629,864.

To all whom, it may concern.

Be it known that 1. Emma 51. thirrn. a

citizen of the United States, and a resident of llound'hrook, Somerset. county, State of i New Jersey, have invented certa in new and useful Improvements in Cmbureters for.v

Hydrocarbon-Engines, of which the following is a full and clear specification, illnstrated in the accompanying! drawings, the

particular novel features of the invention being more fully pointed out in the annexed claims.

The object of my invention is to provide a simple and highly etlicient carburetor for automatically WIIPOIiZlIiQ carhurant and mixing it with air to form a mixture of the requisite quality in accordance with the amount of work which the engine is to per form at the time to which the carburetor is attached.

My improved carburetor is adapted for use in stationary hyi'irtxtarhon engines as well as in hydrmtarbon engines used in pro pelling vehicles, boats, or the like.

In particular my invention relates to unproi ements in the carburetor described and illustrated in my copending application. Serial Number 497,646, filed May 22. 190i), and the structure illustrated in the present application is an improvement with regard to certain features which will be more clearly set forth hereinafter.

in the accompanying drawings Figure l il'ull side View of my carbureter. Fig. 2

den view of the section taken on line Fig. 3 is a vertical section in Fig. 3%. at: a line oi Fig. I, seen in the direction oi the arrow. Fig. i is a. section through the fuel receptac.e on the line in 3 seen from the left hand side. Fig. i is an inner view of too central portion of the fuel I'Bthiltutlfi looking to the left in Fig. 3.

Referring now to Figs. E, ii and ii, i and constitute the'outer shell which is horizontal? lividcd into two noriiom l and i the divs-non line being; at i lat-ad i l. The two shell portions are held it 74 I by means oi hinged baits 5' -E hinged on diametrically opposite sides oi the one:-

shell :2 on lugs 10, correspoiniiin: lugs ll being; provided at the upper shell 3 over which the hinged bolts are thrown so that the two shell portions can be tightly attached to each other by means of nuts. Across the opening of the lower shell 2, is stretched a. wire screen 4 to prevent solid matter from being sucked into the shell. The screen may be fastened across this lower opening in any suitable manner for instance by a ring 12 as shown in Figs. 1 and 3. The opening 3 of the upper shell is somewhat smaller than the lower opening so that the upper shell assumes a dome shape as shown.

3 Within this entire outer shell inst described is disposed transversely a fue rece tacle 6 in such manner that it has pivota' movement on trunnions 77 provided at either end of the receptacle and 'ournaled in the wall of the shell. Prefera ly and for obvious reasons the pivoted axis coincides with the plane on which the two shell portions 1 and 2 meet, so that; when the two shell portions are so arated the fuel receptacle may be easily removed therefrom. The preferred construction of the fuel receptacle as may be seen from Fig. 3 is such that the right hand trunnion 7 is integral with the main body of the receptacle 6 whereas the left hand side of this receptacle is open and the left hand trunnion 7 is threaded into this opening with a gasket 13 between the trunnion and the receptacle body to prevent leakage of fuel at this point.

The left hand trunnion 7 is hollow and nion T, is adapted to form an abutment for" packing 15 which may be inserted into the space left between the two shoulders to prevent leakage of fuel through the joint between the L and the runnion. The upward pointing portion of the L 8 abuts against a lug 16 provided on outer shell 1, with a packing washer 1T interposed. Into lug 16 is threaded a nipple 18 which contains a fuel valve 19 the upper end of which is also threaded to receive the usual pipe connection (not shown). Valve Stem 20 passes centrally through nipple 18 with suitable space between the nipple boring and the valve stem to permit fuel to pass through it into the L 8 and into the fuel receptacle 6. It will be noted that the fuel pressure in the pipe line bearing upon valve 19 tends to seat this valve. Fuel receptacle 6 contains a float 22 which is pivotally fastened by means of an arm 24 in the horizontal end of the L 8 on a horizontal transverse pivot pin 23. Arm 2-1, as will be seenfrom Fig. 3, extends rearwardly into the L 8 and carries a disk 25 at this end which is in line with valve stem 20. The correlation of the elements, the valve stem, the float and disk flz'ifjust described. such that if the fuel is on the normal le\el 1 -1 in receptacle (3, the float assumes the position illustrated. whereby disk 25 just touches the foot of the valve stem 20, valve 15* being seucd at that time, so that no fuel can enter the receptacle. It will thus he noted that if the fuel receptacle 6 is rocked on its trunnions for the purpose which will be described hereinafter, float 22 remains stationary rela tivcly to this pivotal motion of the receptacle, whereas of course the float 22 may have its own pivotal motion in the vertical direction on its pivot 23 when for instance fuel level 1-1 falls below the normal, so that disk 25'may lift valve 19 to admit fuel. This construction and operation of the fuel valve by means of a float is well known in the art, the particular novel feature being the independent support of the fuel receptacle which contains the float and the Heat receptacle, whereby both may have their own pivotal movements independently of each other.

The right hand trunnion 7 of the flcat receptacle protrudes beyond the outer-shell 12 and a rocking arm 26 shown more clearly in Fig. 1, is fastened to it so that by means of this arm the fuel receptacle may be rocked in either direction. I will now shortly describe the purpose of this pivotal movement of the float receptacle which has been fully set forth in my aforesaid application.

The receptacle 6 is provided with fuel passages in its wall into which are inserted as shown tubular extensions 27. Fine fuel nozzles 28 areprovidcd at. the ends of these tubes. Vhile this particular form of leading the fuel from the inside of receptacle (3 to the outside by mean of tubes 27 is of particular advantage in this form of carburetor, illustrated, it is obvious that the length of tubesQ? may be varied even to such extent that the fuel nozzle is in the I Wall of the receptacle (5. As will appear from Fig. -i tubes '37 of dillcrent length are shown as disposed at different distances from the normal gasolenc level l t in the Also as will be seen from F g.

vide the fuel discharge through the tubes as evenly as possible over the total semicircular area in which they are located.

Integral with receptacle 6 is a disk 29 which is located substantially in the plane through the fuel level 1 1 and which is of sjltll size that when in horizontal position it substantially closes the air passage through the Otttcl' shell 1, 2, save for a small cut out portion 3t). shown in Fig. '2, through which air may be admitted at any time to the upper portion of the shell which I shall hereinafter term the mixing chamber. It will also be noted that one of the discharge tubes 97 is located within this cut out portion 30 as shown in Figs. 2 and 3. Now if arm 26, which controls the movement of receptacle 6 fs rocked downward more or fewer discharge tubes 27 are brought in line with the fuel level 1-" -1 or below this level, according to the degree to which arm 26 is rocked, so that fuel is discharged through these tubes from the interior of the receptacle. It will be seen that if this occurs when the engine to which the upper end of the carburetor is connected draws in air, the air in rushing past the fuel nozzles will pick up finely divided fuel which is mixed with the air in the mixing chamber thereby and forms the desired explosive mixture. It will be noted from Figs. 3 and 4, that the air can not pass from the lower to the upper portion of the cute! shell at the side of disk 29, opposite to that side where the fuel nozzles are provided on account of a lower extension 31 of quarter sphere, preferably integral with disk 29 which quarter sphere conforms substantially with the inner adjacent wall of the outer shell. If the receptacle is tilted into the opposite direction it will be noted that all the fuel discharge passages are elevated above the gasolene level 1-1 so that no fuel can emanate therefrom and simultaneously dish 2*.) will admit air to the upper part, of the 'outer shell on both sides of its pivotal axis. The detail features of this construction have been clearly explained in my above named copending application so that further description thereof may be omitted froesthe present case.

From the preceding description of the float operation and its manner of support, it clearly appears that whenever the fuel-level l- 1 falls below the normal through the discharge of fuel through the fuel passages,

disk 23 is raised thereby and lifts valve 19 which thus admits fuel to restore the normal level in the receptacle. l\ ow, while. the fuel receptacle is tilted so that all fuel discharge tubes are elevated above the normal level, no fuel being rctptired at that time,' I find it convenient to have means by which the con trol of the float over valve 19 is withdrawn by locking the lloat in such position that disk 25 cannot touch the foot of valve stem 20. I obtain this effect in the following manner: The inner rim of the left hand trunnion 7, Fig. 3, is beveled and acrossthis cone-shaped portion of trunnion 7 a rod 35 is placed and fastened at both ends to the trunnion so that it must rotate with the latter when the receptacle is rocked. In normalpositicn of the receptacle 6 which is shown for instance in Figs. 3 and 4:, this rod 36 as will be noted from Fig. 5, is set at an angle to the horizontal and close to arm 24 of Heat 22, without however, touching it in this position. nion 7 is rocked with the receptacle counterclockwise (which in Fig means clockwise) rod 35 is moved out of the downward path of arm 24 so that in case the float level falls below the normal, the float with its arm is free to tilt downward to restore the fuel level to normal. If, on the other hand, trunnion 7 is rotated in the direction of the arrow, it' will. be noted that rod 35 moves to the underside of arm 24 and slightly lifts this arm and thus the float, so that thereby disk '25 at the rear end of arm 24 is'depressed and brought out of contact with the valve. In order to cause rod 35 t'o-lift arm 24, it is necessary that at the point where rod 35 touches arm 24, the central axis of arm 24 be slightly below the pivotal axis of the fuel receptacle or also the size of rod 24 may be slightly enlarged at the underside where'rod '35 touches which obvidusly has the same effect. Thus so long as the receptacle is tilted backward whereby all fuel discharge nozzles are elevated above the level of the fuel, the float is locked and. thus the control of the float over the valve withdrawn. Upon tilting the receptacle 6 back to the normal -position or below the normal po si tion in which more or-lcss fuel noz zles are brought into operation as described, the control over the valve is restored to the float by rod 35 moving out of the downward path of arm 24. a

' In my aforesaid application I have shown and described how' the fuel receptacle with its valve disk 29 may be thrown into operative position in which it supplies fuel to the air passing through the outer shell, either' by hand or through the suctioncf the engine. I find it a great advantage to provide another valve member above the fuel receptacle which opensand. closes with the increase or decrease respectively of fuel discharge of receptacle 6 this effect being obtained by interconnecting the two valves so that they move in fixed relation to each other. I have shown in Figs. 1 and 3 a convenient form of such double valve construction. Above disk 29 and receptacle 6 and in parallel to its pivotal axis, is mounted a throttle valve 36 which has its pivotal bearings in .upper casing 1 as shown. The right hand end of the valve trunnion 27 Now, if in Fig. 5,the trun-" valve can be opened and closed. Another 1 arm 39 is fastened on trunnion 37 adjacent to arm 38 by which this valve system may be connected to the throttle lever near the operators seat. Ann 38 of valve 36 and arm 26 of valve disk 29 are'linked together by means of rod 40, thesetwo valves being set relatively-to each othersuch that when disk 29 assumes its normalhorizontal position as shown in Fig. 4, and also in Fig. 1, by the dash line a, throttle valve 36 is already slightly open as shown in Fig. 3 and in Fig. l by a dash line'b. Now, if with reference to Fig. 1, controlling arm 39 is thrown to the left, arms 26 and 38 are both thrown downwardto admit mixture to the engine. Arms 26 and 38 are yieldably connected-with each other by having rod 4.0 pass through stud 41 pivotally attached to arm 38 and by havinga spring 42 connected at its two ends with stud 41 and nut 43 respectively, the nut being threaded to both may have their own pivotal movement independently of eachother.

-2. The combination'with a carbureter, of a revolubly mounted fuel-receptacle and a float'pivotally supported in said receptacle independently of the receptacle,'- whereby both ma have their own pivotal movement indepen ently of each other, and means controlled by the pivotal movement of said float for istipplying fuelto said receptacle.

3%} carburetor having a fuel receptaclerotatably disposed to discharge fuel through its wall, a float located. in said receptacle and pivotally supported independently of the receptacle and stationaryi relatively to the rotation thereof and means controlled by the P t l movement of said float, for-supplying fuelto said receptacle.

v 4. A carbureter having an'outer shell forming a passageway for air andfuel mixture, a fuel receptacle pivotally disposedtherein and adapted when rotated to discharge fuel into said shell through passages provided in its w all, said receptacle containing a float, stationary with relation to the pivotal movement of the receptacle, and

l means controlled by said fioatfor admitting fuel to said receptacle:

5. A carbureter having an outer shell &

forming a passageway for air and fuel mixture, a fuel receptacle pivotally disposed therein and adapted when rotated to discharge fuel into said shell through passages provided in its wall, said receptacle containing a float pivotally supported atone end to swing in a vertical plane, but stationary with relation to the pivotal movement of the receptacle, and means controlled by said float for admitting fuel to said receptacle.

(3. A carburetor having an outer shell forming a passageway for air and fuel mixture, a fuel receptacle pivotally disposed therein and adapted when rotated to discharge fuel into said shell through assages provided in its wall, a stationary el supply pipe leading into said "receptacle having suitable packing at the junction with the receptacle, a float pivotally attached by an arm within and to said supply pipe and having its main portion located in said receptacle and being stationary relatively tothe rotation of said receptacle and a fuel valve in said supply pipe controlled by the pivotal movement of the float arm for 'supplying fuel to the receptacle.

7. A carbureter having an outer shell forming a passageway for air and fuel mixture, a fuel receptacle pivotally disposed therein and adapted when rotated to discharge fuel into said shell through passages provided in its wall, said receptacle containmg a float, stationary with relation to the pivotal movement of the receptacle, and means controlled by said float for admitting fuel to said receptacle, means connected to said receptacle for permitting free movement of said float when thereceptacle is rotated in one direction, but preventing such movement when the receptacle is rotated in the other direction.

8. A carbureter having an outer shell forming a passageway for air and fuel mixture, a fuel receptacle pivotally disposed therein and adapted when rotated to dis charge fuel into said shell through passages provided in its wall, a stationary fuel supply pipe leading into said receptacle having suitable packing at the junction with the receptacle, a float pivotally 'attached by an arm within and to saidsupply pipe "and having its main portion located in said receptacle and being stationary relatively to the rotation of said receptacle and a fuel valve in said supply pipe-controlled by the pivotal movement of thefloat' and for supplying fuel to the receptacle, and a rod disposed transversely in said receptacle adjacent\to the point where said supply pipe enters and adjacent to said float arm, said rod when turned into vertical line by rotation of the receptacle in one direction permitting free movementof said float to control its valve and when gradually turned into horizontal line by the receptacle rotation in the other direction, tending to arrest the movement of said floatto prevent its valve control.

9. A carbureter having a fuel receptacle rotatahly disposed todi scharge fuel through its wall, a float located in said receptacle and pivotally supported independently of the receptacle and stationary relatively to rotatably disposed to discharge fuel through its wall, a float located in said receptacle and carried by an arm pivotally supported independently of the receptacle, whereby said-float remains stationary relatively to the rotation of said receptacle, means controlled by the pivotal movement of said float for supplying fuel to said receptacle and an arresting member fixed to said receptacle and located adjacent to said arm permitting free movement of said arm when the receptacle is rotated in one direction, but arresting said arm and float in inoperative position relatively to said fuel control when the receptacle is rotated in the opposite direction.

11. A carbureter having an outer shell .prcvld'ed. with an air inlet and a mixture outlet, a movable valve element normally obstructing the passage through said shell and including a fuel container adapted to supply fuel through its wall into said shell when rotated from normal position, and a second valve element disposed independently of and between said first element and the said mixtureoutlet and pivotally mounted .in said shell,and suitable connection between 'sa'id two' valve elements whereby they may be simultaneously operated in either'directio'i.

12. A carbureter having an outer shell provided with an air inlet and a mixture outlet, a movable valve element normally obstructing the passage through said shelland including a fuel container ada )ted to supply fuel through its wall into said shell when rotated from normal position. and a second valve elem nt disposed independently of and between said first element and the said mixture outlet and pivotally mount ed in said shell, and a yielding connection,

between said two valve elements whereby they may be simultaneously operated in either direction within predetermined limits but which connection permits said second named element to move in either direction beyond said predetermined limit.

13. In a carbureter of the character described the combination with a shell having in said receptacle pivotally supported indean air and mixture passage and formed of two separable members, a fuel receptacle having its wall apertured to discharge fuel into shell and having pivotal supports between said two members, a float located pendently thereof, and stationary relatively to the rotation of said receptacle and means controlled by the pivotal movement of said float for supplying fuel to said receptacle.

14. In a carbureter of the character described, the combination with a shell having an air and a mixture passage and formed of two separable members, a fuel receptacle having its wall apertured to discharge fuel into said shell and having pivotal supports between said two members, a stationary fuel conduit leading into said receptacle and joined therewith to permit rotation of the receptacle, a float located in said receptacle and pivotally supported independently of the receptacle and stationary relatively to the rotation thereof, said shell having a valve-controlled fuel supply passage normally closed by its valve and joining said conduit at its free end, the valve in said supply passage being controlled by the pivotal movement of said float to supply fuel to the receptacle and automatically closing said supply passage when the receptacle and float are removed from said shell.

ELMER S. SMITH. \Vitnesses:

HARRY E. KNIGHT, M. G. CRAWFORD. 

